Pressure, temperature, level, flow instrumentation and valving to improve your results.

We're honored to be your chosen supplier for

ASCO Valve Co  Honeywell - Field Solutions and Combustion Controls  Siemens Industry Inc  UE - United Electric Controls  WIKA Instrument Corp  Jordan Valve Division of Richards Industries  LowFlow Division of Richards Industries  Steriflow Division of Richards Industries  Hex Valve Division of Richards Industries  Marwin Valve Division of Richards Industries  Bestobell Steam Division of Richards Industries  K-Patents Process Refractometers  Fireye Flame Safety  Maxon - A Honeywell Company  Parker Brass Fittings  Kromschroder - Hauck Manufacturing  West Controls - Including CAL Controls - PMA - Partlow  Ametek Land  Ametek US Gauge  Aquametrix by Water Analytics  A-T Controls Co  Dwyer Instruments  Phoenix Contact - Interface Instruments  PIE: Practical Instrument Electronics  Precision Digital Corp  Pyromation Inc  Rotronic Instruments  Sartorius - formerly GWT Global Weighing Technologies  Thermal Instrument Company 

Get the new Lesman catalog!

The new Lesman master catalog is available now! It's 592 pages of the latest in process control and measurement instrumentation and valving, complete with specs, model selection guides, tech tips, and more.

Get your free copy today!

At Lesman, every one of our employee-owners stands behind the products we sell and the service we provide. We strive for 100% error-free order entry, error-free shipping, and 100% satisfaction guaranteed at all times. If you're not satisfied with the products you buy from Lesman or the services we provide along the way, we'll work with you to achieve that goal.

For the last 50 years, Lesman has been a trusted representative and stocking distributor for process control and measurement instrumentation in Illinois, Indiana, Wisconsin, Missouri, Iowa, and Michigan's upper peninsula.

  • Exclusive representative for Siemens, ASCO Valve, Honeywell, United Electric, WIKA, Jordan Valves and more.
  • Sales team with an average 16 years process instrumentation experience, including degreed mechanical, chemical, and industrial engineers.
  • "No Registration Required" access to free online training, user manuals, and technical tips.

Whatever your goal — reducing energy costs and waste, better inventory management, reducing downtime and maintenance costs, improving product quality — the staff at Lesman will help you get the most value out of your process measurement and control instruments.